605
FNCA52 TJSJ 170730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SUN MAY 17 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-172000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 30
TEMP (24H TREND) 90 (+2) 72 (-3) 90
RH % (24H TREND) 51 (-7) 86 (-4) 45
WIND 20FT/EARLY(MPH) E 17 E 14 E 17
WIND 20FT/LATE(MPH) E 17 NE 13 E 18
MIXING HGT(FT-AGL/MSL)5060 5330
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 75900 74620
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-172000-
SOUTHERN HILLS-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 86 (+2) 69 (-3) 86
RH % (24H TREND) 62 (-6) 97 (+2) 59
WIND 20FT/EARLY(MPH) E 13 E 13 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 13
MIXING HGT(FT-AGL/MSL)5210 5770
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 67730 75010
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-172000-
NORTH COASTAL PLAINS-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30
TEMP (24H TREND) 90 (+1) 72 (-2) 90
RH % (24H TREND) 59 (-7) 98 (+2) 56
WIND 20FT/EARLY(MPH) E 14 E 14 E 17
WIND 20FT/LATE(MPH) E 18 E 14 E 20
MIXING HGT(FT-AGL/MSL)5050 5120
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 75750 81920
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-172000-
NORTHERN HILLS-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 0 50
TEMP (24H TREND) 89 (+2) 70 (-2) 88
RH % (24H TREND) 61 (-7) 97 (-1) 58
WIND 20FT/EARLY(MPH) E 13 E 12 E 14
WIND 20FT/LATE(MPH) E 16 E 11 E 18
MIXING HGT(FT-AGL/MSL)5870 5980
TRANSPORT WND (MPH) E 15 E 16
VENT RATE (KT-FT) 76310 83720
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-172000-
WEST COAST-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 40 50
TEMP (24H TREND) 91 (+1) 72 (-2) 91
RH % (24H TREND) 60 (-5) 97 (+2) 58
WIND 20FT/EARLY(MPH) E 16 E 14 E 14
WIND 20FT/LATE(MPH) E 16 E 12 E 14
MIXING HGT(FT-AGL/MSL)4890 4880
TRANSPORT WND (MPH) E 15 E 13
VENT RATE (KT-FT) 63570 53680
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-172000-
EASTERN INTERIOR-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 50
TEMP (24H TREND) 87 (+1) 70 (-3) 87
RH % (24H TREND) 62 (-6) 97 (0) 60
WIND 20FT/EARLY(MPH) E 14 E 13 E 16
WIND 20FT/LATE(MPH) E 14 E 16 E 14
MIXING HGT(FT-AGL/MSL)5620 6020
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 78680 78260
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-172000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 60
TEMP (24H TREND) 83 (+3) 68 (-3) 82
RH % (24H TREND) 71 (-6) 100 (+1) 66
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 12 E 12
MIXING HGT(FT-AGL/MSL)4650 4540
TRANSPORT WND (MPH) E 18 E 15
VENT RATE (KT-FT) 74400 59020
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-172000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 10 50
TEMP (24H TREND) 87 (+5) 66 (-4) 87
RH % (24H TREND) 63 (-8) 98 (+1) 61
WIND 20FT/EARLY(MPH) E 11 E 9 E 10
WIND 20FT/LATE(MPH) E 10 E 9 E 10
MIXING HGT(FT-AGL/MSL)6230 6550
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 80990 85150
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-172000-
CAYEY MOUNTAIN RANGE-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 50
TEMP (24H TREND) 82 (+1) 69 (-2) 82
RH % (24H TREND) 69 (-4) 99 (-1) 67
WIND 20FT/EARLY(MPH) E 11 E 11 E 12
WIND 20FT/LATE(MPH) E 11 E 11 E 11
MIXING HGT(FT-AGL/MSL)5160 4970
TRANSPORT WND (MPH) E 17 E 15
VENT RATE (KT-FT) 77400 64610
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-172000-
VIEQUES-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 60
TEMP (24H TREND) 88 (+1) 74 (-3) 87
RH % (24H TREND) 63 (-5) 91 (-2) 61
WIND 20FT/EARLY(MPH) E 18 E 17 E 18
WIND 20FT/LATE(MPH) E 17 E 18 E 17
MIXING HGT(FT-AGL/MSL)3420 3720
TRANSPORT WND (MPH) E 22 E 22
VENT RATE (KT-FT) 64980 70680
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-172000-
CULEBRA-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 60
TEMP (24H TREND) 89 (+2) 76 (-2) 89
RH % (24H TREND) 62 (-6) 92 (+1) 57
WIND 20FT/EARLY(MPH) E 18 E 17 E 18
WIND 20FT/LATE(MPH) E 17 E 18 E 16
MIXING HGT(FT-AGL/MSL)3500 3830
TRANSPORT WND (MPH) E 22 E 22
VENT RATE (KT-FT) 66500 72770
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-172000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 20
TEMP (24H TREND) 91 (+1) 73 (-2) 91
RH % (24H TREND) 50 (-6) 89 (+1) 47
WIND 20FT/EARLY(MPH) E 21 E 18 E 20
WIND 20FT/LATE(MPH) SE 21 E 16 E 21
MIXING HGT(FT-AGL/MSL)5040 5160
TRANSPORT WND (MPH) E 23 E 21
VENT RATE (KT-FT) 100800 92880
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-172000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 60 50
TEMP (24H TREND) 86 (+1) 75 (-3) 86
RH % (24H TREND) 66 (-5) 92 (+2) 62
WIND 20FT/EARLY(MPH) E 18 E 18 E 19
WIND 20FT/LATE(MPH) E 17 E 19 E 16
MIXING HGT(FT-AGL/MSL)3450 4130
TRANSPORT WND (MPH) E 22 E 21
VENT RATE (KT-FT) 65550 74340
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-172000-
ST CROIX-
330 AM AST SUN MAY 17 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 60
TEMP (24H TREND) 87 (+1) 75 (-2) 87
RH % (24H TREND) 64 (-6) 92 (0) 61
WIND 20FT/EARLY(MPH) E 17 E 17 E 19
WIND 20FT/LATE(MPH) E 17 E 18 E 14
MIXING HGT(FT-AGL/MSL)4540 5540
TRANSPORT WND (MPH) E 22 E 18
VENT RATE (KT-FT) 86260 88640
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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